Turntable for paper roll stands



Feb. 12, 1952 w, SHOWALTER 2,585,859

TURNTABLE FOR PAPER ROLL STANDS Filed Oct. 14, 1947 5 Sheets-Sheet 1INVENTOR. [FAY/V6 l L /mn flz rae 1952 F. w. SHOWALTER 2,585,859

TURNTABLE FOR PAPER ROLL STANDS I Filed 001:. 14, 1947 v 5 sheets-shed?IN VEN TOR. fk/i/VK W 5/0/4492 x5e Feb. 12, 1952 F. w. SHOWALTERTURNTABLE FOR PAPER ROLL STANDS 5 Sheets-Shae 5 Filed 001;. 14, 1947 e 5E .a. 0 5 l 0 W; 5 n 5 c m5 W\ W l W k M Z 5 Y 3 0 w r a 0 Q W 5 5 1 O 1w 0 1 .2 3 u a B m k E w 2 4 a 3 4 H 1952 F. w. SHOWALTER 2, 9

TURNTABLE FOR PAPER ROLL STANDS Filed Oct. 14, 1947 5 Sheets-Sheet 5 77a; as,

mmvrox. Fran/z h! .fwmqzrz-ze [Iraq/vy- Patented Feb. 12, 1952 UNITEDPATENT. OFFICE j E 2,585,359 F V PAPER ROLL STANDS- Frank wf s howauer',west Carrollton, Ohio, as-

signp1.,.t0 The; American Envelope Company, West Carrollton Ohio, acorporation of Ohio Application Octobe'rl l, 1947,'Seria1No. 779,753

11 Claims (01. 242-64)' This invention relates to a turntable for paperroll stands.

' Asis well known paper comes from the paper making machine in the-form'oi 'a continuous web which is wound into rolls-for handling andstorage. When the paper is'to be used'or shipped in the form of sheetsthe webs 'areied'from the rolls to a cutting machine which severs'thesame into sheets or sections of: the-desired length.

It is desirable that the webs be simultaneously withdrawn from aplurality ofrolls and fed to the cutting machine is superposed-"relation sothat each cutting operation will sever sheets from all thewebs. For this purpose a plurality Iof rolls may be rotatablysupportedbn' the respective stands of a series of roll standsso arrangedthat the web from each succeeding roll willrextend lengthwise of andwill'be superposed on the web from the next preceding roll, and theseveral superposed webs fed to the "cutting machines: A

roll of paper of normal size isvery heavy. and

considerable time is required 'fo'r 'mounting the same on a stand.Consequently: when the .webs have been completely Withdrawn from aseries of rolls a relatively long time is requiredto-mount other rollson those stands and during this time the cutting machine is idle. andproductionceases.

One object of the invention is to. provide means "A further object ofthe .invention isto provide a'rotatable structure having thereontwoseries. of roll stands so arranged that, apartial rotation;

of the structure'will move. the stands of'one series from deliveryposition to loading position and at the same .time move'thestandsof theother series from loading. positionwto delivery.

A further object of the invention is to providesuch a rotatablestructure having power 'operposition.

ated means for moving the: structure to: a predetermined position'andmeans for. looking. the

same in said position.

a locking device for such a rotatable structure including a lockingmember on saidstructure, a

second locking member supported independently of: saidstructure'andmeans for indicating to an webs there A further object ofthe invention is to provide operator the relative positions of saidlocking members.

A iurther object of the invention is to provide such a rotatablestructure with means for interrupting the movement thereof when it movesbeyond locking position.

I A' further object of the invention is to provide each stand withsimple and eihcient means for supporting a roll thereon and foradjusting the roll with relation thereto.

Other objects of the invention may appear as the mechanism is describedin detail.

In the accompanying drawings Fig. 1 is a top plan view, partly insection, of an apparatus embodying the invention; Fig. 2 is an enlargedsection taken on the line 2--2 of Fig. 1; Fig. 3 is a section taken onthe line 3-3 of Fig. 1, partly broken away; Fig. 4 is a detail view ofone of the rotating devices; Fig. 5 is a plan view of an adjustablearbor supporting device, or saddle;

Fig.6 is a side elevation of the device of Fig. 5;

Fig. 7 is a section taken on the line l'! of Fig. 5; Fig. 8 is a sideelevation of a non-adjustable ar-borsupporting device; Fig. 9 is asection taken on the line 99 of Fig. 8; Fig. 10 is a section on lineIll-I0 of Fig. 11, with the power unit in elevation and partly brokenaway; Fig. 11 is a top plan view of the locking device; Fig. 12 is asection on the line l2--I2 of Fig. 11; Fig. 13 is ,a side elevation ofone roller mounting; Fig. 14 is an axial section taken through a rollermounting and the roller driving element; and Fig. 15 is a circuitdiagram of the control mechanism.

In these drawings I have illustrated one embodiment of my invention andhave shown the *same in a form designed primarily for supporting twoseries of paper roll stands and for moving said series alternately intoand out of alinement with a paper cutting machine, but it is to beunderstood that the mechanism as a whole, as well as the several partsthereof, may take various forms and may be used for various purposeswithout departing from the spirit of the invention.

In the illustrated embodiment the invention comprises a turntableincluding a frame 20 mounted for movement about a vertical axis 2l.'

The frame may take various forms and is here shown as comprising twopairs of beams 22 and 23 connected one with the other by other beams orbars 24. The frame is provided at its center with a vertical socket 25which receives and is rotatably supported on a pivot pin 2! which isrigidly mounted on the base structure or floor 26. Preferably boards orsheet material are placed on the beams 24 to form a floor betweenadjacent beams 22 and 23. The frame is supported for rotation about itsvertical axis by a plurality of series of rollers, there being in thepresent instance three concentric annular series of rollers 21, eachincluding four rollers, which travel on corresponding series" of annulartracks 28. In the arrangement shown each roller is mounted in a mountingor bracket 29 rigidly secured to and depending from one of the beams,

22and23. 7

Mounted on the frame are 'two' parallel'series of paper roll standsarranged on. the respective sides of the vertical axis 2 l, theitwo.seriesbeing here designated as A and B. Each stand ofeach .22.. or 23.The roll supporting devices on the higher stands are so arranged thateach upper roll will be supported above the two adjacent seriescomprises two upright 7 standards, the

standards of series A being mounted respectively on the two beams 22 andthe standards-of series B being mounted respectively on the two beams23. Adj cent stands. oi bo h series rep eierably of difierent heights,and the outer and... inner tandar s of-each hi her, st nd are desi naterepectively as 3.9 and. Shandthe outerand inner standards of e ch lowerstand ar designated. respectively as a and 31m. Th standards of. achstand, both hishand low. are provideda their upper, ends with.saddles.:..o.r supportin bea n forthe. arhors...32..of the paper rolls.The saddle for one standard; of. each stand. in. the present instancetheoutenstandardtfl or 30a, comprises a..base;.33. mounted on the upper endof the standard and havinga suideway. extending lengthwise. of.the.arbor3 2. slidably, mounted in the .guideway isa. supporting member 34. whichmay be-adjustedby ascrew 35. rotatably mounted-on the base 33-, havingat its Quterend a hand wheel. andv having on its innor threaded portiona uttlwhich is arranged between lugs..38. dependingfrom the supporting;member 34 so as to cause: thatmember to move.

' with thenut. .The supporting. member 34. is.

provided in its upper: portion withv a guideway 39 extendingtransversely/to the arbor, 32. and. slidably mounted in. this guidewayis a block In. which is adjusted by a screw M rotatably mounted on andheld against axial movement with relation to. the block ML andv having,on. its threaded portion. a nut 42 arrangedbetween lugs. 43 on thesupporting. member. 34. theblock M! for rotation about. a vertical. axisis a bearing block 44. having in the uppersurface thereof anopenhearingrecess 45 to receive and. support one end portion of the arbor 32.Mounted. on e b aringblook .44. s by. means ofa stu 46, is a flexiblemember. such. as a metallic strap 41, which extends forwardly fromthestud and.

then upwardly and rearwardly above the bearing recess 45 and isapertured to receiveanscrew threaded stud 48 on which is mounted a. nutv59;

by which the strap 41 may be secured in posl tion above the arbor in thebearing, recess, to. retain the latter in the recess.

Mounted on the other standard, 3| 017,311 of each stand is a base 50 onwhich is mounted, a bearing member 5| having therein a bearing recess 52to receive the adjacent end portion of the arbor 32. Pivotally mountedon the bearing, member on one side of the recess is an 21111153 adaptedto extend forwardly above an arbor in the bearing recess and havingpivotallymounted thereon a latch member 54 movable into-and out ofengagement with a lug or keeper 55, on the bearing block 5|. The.bearing member 51 is. preferably mounted on the base 50 for movementMounted .on

rolls onthe lower stands with its axis in a vertical plane between saidlower rolls, thus enone to the other so that a large number of rolls 1may be mounted in a relatively small space, there being in the presentinstance twelve rolls in each series of rolls. With the rolls soarrangedthe web from the foremost upper roll willbe withdrawn from thetape! the roll lengthwise of, th series. the web from. the. foremostlower roll will bewithdrawn. upwardly aboutthe foremost. upper rollandsuperposed onithe web, from the first on- Dev roll, the web. fromthesecond upper roll will be. withdrawn from thetop thereof abovethe twoPreceding rolls. and. so on; until the webs from the twelve rolls aresuperposed one upon the other. and move in true parallelism to the pointat. which. they are tobe. operated upon. The severing mechanismis:.usually, a cutting machine having feeding meansfpr movingthesuperposed webs. between the cutting. elements, and it is in-.dicated diagrammatically. at 51. so supported on the stands of series A,in Fig. 1. that the webs will be withdrawn therefrom in a forwarddirection toward the-severing mechanism, asshown in Fig. 2. In reloadingthe stands of series. Bthe. rolls are somounted thereon that the webs.extend therefrom in a direction opposite the direction in which they arebeing withdrawn from'the rolls'oi. series A. the. supporting structure.is rotated to move the stands of series. B into line with the severingmechanism the webs will be withdrawn from the rolls. onsaid standstoward the severing mechanism.

5 Rotary movement may be imparted to the frame 20-, to reverse-thepositions of the two series of stands, in any. suitable manner.Preferably apart ofthe rollers which support the frame are motor driven.In the present arrangement each of the four rollers- 21 which travel onthe outer-- most annular. track 28" is provided with a driving element,such as a sprocket wheel 58, which is.'shown in Fig. 14. as rigidlysecured to the shaft 59 on which the. roller is mounted; This drivingelement is 'operatively connected with a reversible electric motor 60mounted on the frame 20. and, in'the. present. instance, the sprocketwheel 58fis connected .by a sprocket chain 6| with aspr'ocket wheel 62secured to. a shaft 63 which is driven by the motor 60 throughconventional;

gearing. nothereshown- The operationof these motors ismanuallycontrolled by an operator as will bahereinafter described andmeans are pro vided for-locking the rotatable frame in either of twopositions, that is in a position in which either the stands of series Aor the stands of series B willbe in a, position to deliver the webs tothe cutting mechanism. For this purpose a locking deviceis provided.comprising a locking membersecuredtothe rotatable frame and a secondlook- The rolls are.

Thus when 5.. ing member mounted on a fix'ed' support adjacent the framefor movement into and out oflocking engagement of the locking member onthe frame. Preferably two such locking devices are arranged at theopposite sides of the frame. As shown in Fig. l the two locking members64 are rigidly secured to the frame in diametrically opposite positionsand are preferably in the natureof sockets. Mounted on the supportingbase 26 adjacent the locking positions of the respective lockingmembers-6 3 are bolts 65 and 65a, each bolt being adapted to enter andthus have locking engagement with either of the locking members 64 whichis moved into line therewith. The locking bolts 65 and 65a arepreferably power operated and each is here shown as mounted in a guidemember 66 which is rigidly secured to a, base plate 61. Also mounted onthe base plate '61 is a fluidcylinder I58 having therein a piston 69,which is connected by a piston rod with the bolt, and

of informing theoperator as to the relative positions of the lockingmembers 64 and 65 there is provided at the control station an indicatingdevice which is controlled by the rotary movement of the frame 28 and isconnected with the controls for the motor circuits.

- Electric current is supplied to the motor 69 through apower line 4 andthis power line is provided with magnetically operated switches tocontrol the operation of the motors and the direction of rotation of theframe. These switches are shown diagrammaticallyat I5 and I6 and areconnected in a control circuit IL-18; Manually operated switches I9 and80 in the control circuit'separately energize the two power lineswitches and I6; Also connected in the power circuit are the devices forindicating the relative positions of the locking members. In the presentinstance separate indicating devices are provided for the two lockingdevices. The conductor I8 of the control circuit leads from the sourceof current, such as 110 volt service line, to a normally closedmicroswitch 8I having an actuating member 82 by which it may be opened.A conductor 83 leads from the normally closed switch 8| to a secondnormally closed microswitch 84 which has an actuating member 85. Aconductor 86 leads from the switch 84 to a normallyclosed microswitch8'! having an actuating'member' 88.

A conductor 89 leads from the switch 81 to a lamp 90 which in thepresent instance is designated as a green lamp and which is connectedwith the conductor T1 of the control circuit. The conductor 86 is alsoconnected with a two way microswitch 9| the terminal 92 of which isconnected by a conductor 93 with a second lamp 94 also connected withthe conductor 11 and here indicated as a red lamp. The terminal 95 ofthe switch SM is connected by a conductor 96 with one side of.

a normally closed microswitch 98 which is con nected by a conductor 99with a second g'reen; The conductor 91 is also connected light I00. witha two way microswitch I 0| having an actuating device I02. The terminalI03 of thesw-itch- IOI is connected by a conductor I 04 with a secondred lamp I05. The second terminal I06 of the 6. switch IN is connectedby: a conductor I01 with oneside of the manually operated control switch80, the other side of which is connected with the power line switch'lfi. Switches 8'! and 9| are controlled by a switch actuating devicecarried by the rotatable frame.. The actuating members 88 and 9Ia arespaced apart a short distance vertically and the actuating device is inthe nature of a wedge-shaped element I08 adapted to enter the spacebetween these actuating devices to actuate one or both of the switches81 and 9| 'depending upon the continued movement of the frame. Theactuating devices 98a and I02 for the switches 98 and IOI are similarlyarranged and are actuated by a switch actuating device IlIBa'. Thepresent control mechanism contemplates that the turntable shall rotatealternately in opposite directions through the same half circle to moveeach series of stands alternately into loading position and into feedingposition. Thus the turntable moves first in one direction, which forconvenience may be termed the forward direction, to position a givenseries of stands in line with the cutting mechanism and "is then movedin the reverse'direction to move that-se ries of stands into loadingposition. Consequent- 1y it is desirable that both the actuating devicesI08 and 1&1 should be located at the same side of the turntable and theyare here shown as formed-in one piece, the tapered ends of the twodevices extending in opposite directions. In Fig. 12 the actuatingdevice I08 is shown in full lines in contact with the actuating device88 of switch 81 and the actuating device mm is shown indotted lines incontact with the actuating device 98a. of switch 98, on that side of theturntable opposite switch 81. The microswitches BI and 84 are biasedtoward circuit opening positions and the actuating members 82 andthereof are .arranged to be engaged by the bolts 65 and 65a when thesebolts are in their retracted positions, thus maintaining these switchesin circuit closing positions so long as the respective bolts are intheir retracted positions.

When the turntable is to be rotated in a forward direction the operatorcloses control switch I9 to actuate a power line switch 15 and thusclose the circuits through the motor in a direction to rotate theturntable forwardly and this control switch 'l9 is retained closed untilthe turntable has completed its movement in that direction. The lockingbolts 65 and 65a being then in their retracted positions, switches 8|and 84 are closed and current in the control circuit will flow fromsupply line 18 throughswitch 8I, wire 83, switch 84, wire 86, normallyclosed switch 8?, wire 89, green lamp to the returnline 11, thusilluminating the green lamp 90. At the same time current-will flow fromthe switch 84 through wire 97, switch 9s and green lamp I00 to thereturn line TI, thus illuminating both of the green lamps. As thelocking sockets 64 closely approach alinement with the locking bolts 65and 65a the actuating device I08 will open switch 8! and thus extinguishthe green, lamp 90 indicating that thebolt 65 is in a position to enterthe locking socket. The operator then releasesthe control switch 19 andstops the motor and then actuates the control valve 12 to energize thehydraulic devices 68 and move both bolts into locking relation to theirrespective sockets. The movement of the bolts to' locking positionsopens the switches 8| and '84 and thus extinguishes the" green lamp I00as well as the green lamp 90; Both green lamps being'darktheoperatorzknows that the turntableis locked. It: is not essential thatthe turntable should be stopped with the sockets in exact alinement withthe respective bolts because the tapered ends f the bolts will permitthe same to enter the sockets and the force exerted upon the bolts willimpart to the turntable any movement necessary to bring the sockets intoexact alinement withthe bolts. However, should the operator fail to openthe circuit promptly the continued movement of the turntable would;carry the sockets slightly beyond locking, relation to the bolts andwhen this happens the further movement of the actuating device I08 willclose normally open switch SI and current will flow through wire 93, redlamp 94', to the return line 11, thustilluminating the red lamp andnotifying the operator that the locking devices are notin alinement. Hethen closes control switch 80' to energize power line switch I6 andreverse the direction of operation of the motor and of the turntable.The actuating device I08 is thus retracted and releases switch 9I andpermits the same to open. Thus both the green lamp 951 and the red lamp94 are dark and the operator knows that the locking devices are inalinement and operates the controlling valve to move the bolts tolocking positions, and this movement of the bolts opens switches 8| and84 and extinguishes all the lamps.

When the turntable is to be rotated from its locked position in areverse direction all lamps are dark and the operator knows that theturntable is locked and that he must actuate his control valve [2 torelease the table before energizing the motors. retracted he closes thecontrol switch 80 and energizes the power line switch 16 to cause theturntable to be rotated in a reverse direction. The closing of controlswitch 80 closes the circuit through the switches 8!, 84, 98, wire 99,and green lamp I00, to the return line 11. At the same time thecurrentflows as above described through switch a'l and green lamp 90 so thatboth green lamps are illuminated. The operation is then the same asabove described and as the bolts appreach locking positions theactuating device I08a will open switch 98 to darken green lamp I00 andthe operator releases the control switch. If the locking devices movebeyond locking positions the circuit is closed through switch IOI,

wire I 01, and red lamp I05 to return line I1, thus illuminating redlamp I05 andnotifying the operator that the locking devices are out ofalinement and he proceeds to restore the same as before.

-It will be noted that the green lamps 90. and I00 are connected in thecontrol circuit independently of the control switches I9 and 80.Consequently if the bolts 65 and 65a are in their retracted positionsand the master switch, not shown, in the control line is closed thegreen lamps will be illuminated to inform the operator that theturntable is unlocked and that the motors may be energized. Theextinction of either green lamp notifies the operator that the.

While I have shown and described one embodiment of my invention,.I wishit to be understood that I do not desireto be limited to the detailsWhen the bolts have been thereof: as various modifications personskilledin the art.

Having now fully described my invention what I, desire to secure byLetters Patent is:

1. A turntable for paper roll stands comprising a horizontal framemounted for rotation about a vertical axis, rollers supporting saidframe for movement about said axis, two substantially parallel series ofroll stands mounted on said frame on opposite sides of said axis, eachstand having means for supporting a roll of paper for movement about ahorizontal axis, the several roll supporting means of each series ofstands being so arranged that the webs of paper may be withdrawn fromthe rolls on said series of stands lengthwise of said series of standsand in superposed relation one to the other. and means for impartingrotary movement to said frame.

2. A-turntable for paper roll stands comprising a horizontal framemounted for rotation about a vertical axis, rollers supporting saidframe for movement about said axis, two substantially parallel seriesor" roll stands mounted on saidframe on opposite sides of said axis,each stand having means for supporting a roll of paper for movementabout a horizontal axis, the several roll supporting means of eachseries of may occur to 8.

stands beingso arranged that the webs of paper.

may be withdrawn from the rolls on said series of stands lengthwise ofsaid series of stands and in superposed relation one to the other, meansfor adjusting said rolls with relation to their respective stands tocause said webs to move in. paths having a predetermined relation one tothe other, and means for imparting rotary movement to said frame.

3. A turntable for paper roll stands comprising a horizontal framemounted for rotation about a vertical axis, rollers supporting saidframe for movement about said axis, two substantially parallel series ofroll stands mounted on said frame onopposite sides of said axis, eachstand including a. pair of laterally spaced upright standards, bearingscarried by the standards of each pair of stands to receive therespective end portions of an arbor for a roll of paper, alternatestands of each series of stands being. of different heights and theseveral stands of each series being spaced one from the other distancesless than the initial diameter of one of said rolls of paper, wherebyeach roll on the higher stands is supported with its axis above and in avertical plane between the adjacent rolls on the lower stands, and thewebs may be simultaneously withdrawn from all rolls on said series ofstands in superposed relation one to the other.

4. A turntable for paper roll stands comprising a horizontal framemounted for rotation about a vertical axis, rollers supporting saidframe for movement about said axis, two substantially parallel series ofroll stands moimted on said frameon opposite sides of said axis, eachstand having means for supporting a roll of paper for movementabout a.horizontal axis, the severalv roll supporting means of each series ofstands being so arranged that the webs of paper may be withdrawn fromthe rolls on said series of stands lengthwise of said series .of standsand in superposed relation one to the other,.power operated means onsaid frame for imparting rotary movement thereto, and means forcontrolling the movement of, said frame by said power operating means.

5. A turntablefor paper roll stands comprising a horizontal framemounted for movement about a vertical axis, a plurality of annulartracks 'below said frame and concentric with the axis thereof, acorresponding plurality of series of rollers having supportingconnection with said frame and movable on the respective tracks, twostraight line series of roll stands mounted' o'n said frame -*onoppositesides 1 of said axis, each s'tand having-means for-supporting a roll ofpaper formdvement about its-longitudinal axisj't he roll supportingmeans of each series of stands being so arrangedthat the webs of papermay be simultaneously withdrawn from the rolls on said series of standslengthwise of said series and in superposed relation one to the other, aplurality of motors mounted on said frame and having driving connectionwith the respective rollers of one series of rollers, and controllingmeans for said motors supported independently of said frame.

6. A turntable for paper roll stands comprising a horizontal framemounted for rotation about a vertical axis, rollers supporting saidframe for movement about said axis, two substantially parallel series ofroller stands mounted on said frame on opposite sides of said axis, eachstand having means for supporting a roll of paper for movement about ahorizontal axis, the several roll supporting means of each series ofstands being so arranged that the webs of paper may be withdrawn fromthe rolls on said series of stands lengthwise of said series of standsand in superposed relation one to the other, power operated means onsaid frame for imparting rotary movement thereto, a locking member onsaid frame, a second locking member movable into and out of lockingrelation to the first mentioned locking member, a control station, andmeans-at said control station to control the movement of said frame bysaid power means and to cause said second locking member to move intolocking relation to said first mentioned locking member.

7. A turntable for paper roll stands comprising a horizontal framemounted for rotation about a vertical axis, rollers supporting saidframe for movement about said axis, two substantially parallel series ofroll stands mounted on said frame on opposite sides of said axis, eachstand having means for supporting a roll of paper for movement about ahorizontal axis, the several roll supporting means of each series ofstands being so arranged that the webs of paper may be withdrawn fromthe rolls on said series of stands lengthwise of said series of standsand in superposed relation one to the other, a motor on said framedrivingly connected with one of said rollers to rotate said frame, meansfor energizing said motor, a locking member on said frame, a secondlocking member mounted on a fixed support adjacent said frame, anactuating device for said second locking member, and means controlled bythe movement of said frame to indicate the relative positions of saidlocking element. 7 v

8. A turntable for paper roll stands comprising a horizontal framemounted for rotation about a vertical axis, rollers supporting saidframe for movement about said axis, two substantially parallel series ofroll stands mounted on said frame on opposite sides of said axis, eachstand having means for supporting a roll of paper for movement about ahorizontal axis, the several roll supporting means of each series ofstands being so arranged that the webs of paper may be withdrawn fromthe rolls on said series of stands lengthwise of said series of stands"and" in-'-'su'perpo's 2d relation" one-to the other, a motor'on saidframe drivingly connected with one of'sa'id rollers to rotate" saidframe, means for energizing said motor; a: locking member carriedb'ysaidframa a second locking member "movablysupportedadjacent said frame,a power operated -fdevice "to move said second locking member intoengagement with the locking memher off said frame, a control stationadjacent said' frame, and meaiis -at-saidstation to energize respectivly said motorand said power operated-devicet- 9. A turntable for paperroll stands comprising a horizontal frame mounted for rotation about avertical axis, rollers supporting said frame for movement about saidaxis, two substantially parallel series of roll stands mounted on saidframe on opposite sides of said axis, each stand having means forsupporting a roll of paper for movement about a horizontal axis, theseveral roll supporting means of each series of stands being so arrangedthat the webs of paper may be withdrawn from the rolls on said series ofstands lengthwise of said series of stands and in superposed relationone to the other, a motor on said frame drivingly connected with one ofsaid rollers to rotate said frame, means for energizing said motor, alocking member carried by said frame, a second locking member movablysupported adjacent said frame, a power operated device to move saidsecond locking member into engagement with the locking member on saidframe, a control station adjacent said frame, means at said station toenergize respectively said motor and said power operated device, and adevice located at said station and controlled by the movement of saidframe to indicate the position of the locking member on said frame withrelation to said second locking member.

10. In a device of the character described, a structure mounted forrotation about a fixed axis, means for locking said structure in apredetermined position including a locking member on said structure anda second locking member mounted independently of said structure, meansincluding a motor for rotating said structure and accurately locatingthe locking member thereon in a position to be engaged by said secondlocking member, an indicating device comprising two electric lamps ofdifferent colors, a normally closed switch in circuit with one of saidlamps, a normally open switch in circuit with the other of said lamps,and switch actuating means carried by said rotatable structure to openthe first mentioned switch as the locking member on said structure movesinto locking position and to close the last mentioned switch as saidlocking member moves beyond locking position.

11. In a device of the character described, a structure mounted forrotation about a fixed axis, means for locking said structure in apredetermined position including a locking member on said structure anda second locking member mounted independently of said structure, meansincluding an electric motor for rotating said structure and accuratelylocating the locking member thereon in a position to be engaged by saidsecond locking member, a manually operable switch to control theoperation of said motor, an indicating device comprising two lamps, anormally closed switch in circuit with one of said lamps, a two wayswitch in circuit with the other of said lamps and with said motorcontrolling switch and normally in open circuit s,

position with relation to said lamp, switch actu- REFERENCES CITED Mingmeans carried by Said rotatable structure The following references areof record in the to open said normally closed switch when the file ofthis Patent:

locking member on said structure moves into 5 locking position and toactuate the last men- UNITED STATES PATENTS tioned switch to close thecircuit through the Number I Y Name Date second lamp and to open thecircuit through 1,078,8 1 Koch Nov. 18, 1913 said motor controllingswitch when said lock- 1, 94,248 Smith i Aug. 8, 1916 ing member movesbeyond locking position. 1. 1,506,327 Perrault Aug. 26, 1924 2,218,352Fischer Oct. 15, 1940 FRANK W. SHOWALTER. 2,346,903 Cafirey Apr. 18,1944

